Effect of TiH2 on the microstructres and refining performance of Al-Ti-C master alloy

被引：0

作者：

Pan, Xuemin ^{[1
]}

Zhuang, Hongyu ^{[1
]}

机构：

[1] Dalian Univ Technol, State Key Lab Mat Modificat Laser ion & Electron, Dalian 116023, Peoples R China

来源：

PRICM 6: SIXTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-3 | 2007年 / 561-565卷

关键词：

aluminum; self-propagating high-temperature synthesis; Al-Ti-C master alloys;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Al-Ti-C master alloy with or without the TiH2 was prepared by Self-propagating High-temperature Synthesis (SHS) induced by laser. The phases, composition, microstructure morphologies of master alloy and its thermal reaction process were investigated by XRD, EPMA, DTA and SEM. The results show that adding TiH2 has obvious effect in promoting the synthesizing reaction of Al-Ti-C master alloys. Active Ti atoms and catalyzing H atoms released by TiH2 thermal decomposition cause critical reacting temperature of the SHS decreasing. The addition of TiH2 affects the morphologies and distribution of TiAl3 and TiC particles (size of TiC was smaller than 1 mu m in diameter), and restrains the congregating tendency of TiC particles. The refining test on aluminum indicates that master alloys with TiH2 possesses more excellent grain refining perfprmance than without, because of the composition and morphology of the master alloy is cut out for refining processing.

引用

页码：329 / 332

页数：4

共 10 条

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